Test tube



FIG. 1 is a top, left, front perspective view of a first embodiment of atest tube in a closed configuration;

FIG. 2 is a bottom, right, rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof;

FIG. 9 is a top, left, rear perspective view of a test tube in an openconfiguration.

FIG. 10 is top, left, front perspective view of a second embodiment of atest tube;

FIG. 11 is a bottom, right, rear perspective view thereof;

FIG. 12 is a front view thereof;

FIG. 13 is a rear view thereof;

FIG. 14 is a left side elevational view thereof;

FIG. 15 is a right side elevational view thereof;

FIG. 16 is a top plan view thereof; and,

FIG. 17 is a bottom plan view thereof.

The broken lines in the drawings depict portions of the test tube thatform no part of the claimed design. The broken lines shown in FIGS. 11and 17 immediately inside the shaded edge on the bottom and the brokenlines shown in FIG. 9 depict the boundaries of the claim and form nopart thereof.

CLAIM The ornamental design for a test tube, as shown and described.